Transfer for printing on pottery and enamel ware.



' print represent the heavy summon LErcEs'rEn, or LONDON, ENGLAND.

TRANSFER FOR PRINTING ON POTTERY AND ENAMEL WARE.

110 Drawing.

To all whom it may concern Be it known that I, SHELDoN LEICESTER, aBritish subject, residing at London, England, have invented certain newand useful Improvements in and Relatin to Transfers for Printing onPottery and lnamel Ware, of which the following is a specification.

This invention relates to the preparation or manufacture of transfersfor printing upon ceramic ware and vitreous porcelain or other enamelsurfaces, such as decoration of pottery, stained glass and enameledmetallic signs. Such transfers are at present prepared or printed by anordinary lithographic process whereby the designs are drawn on stone ormetal plates or engraved on plates mechanically or by hand; in thelatter case an impression being taken from the engraved plate and placedon the stone or printing plate. This method necessitates a separatedrawing for each piece of a set (such as dinner or tea service) ofdifferent size. From the stone the design is printed upon paper preparedwith gum or dextrin for conveyance and on being wetted adheres to thepottery, the colors which are inorganic pi ments being burnt into theware during ring.

By this .invention a photographic negative is made of the design,drawing, picture or subject taken direct from nature and a positive onglass or film taken from the negative; this positive is photographed onto carbon tissue sensitized paper, and the latter squeezed down onto aburnished metal surface such as a copper cylinder or plate. This isdeveloped in hot water on the surface of the copper by immersing thecylinder and subsequently paintin out the margins with an ironper-chlorid or other etching medium) varnish resist and the design isfinally etched thereon in relief.

A screen is used in printing the carbon transfer, or it can also be usedwhen making the negative or positive' This acts as a pocket of varyingdepth to hold the right amount of ink to give the right shade on theplate. The thinnest parts .of the carbon shades, and the thickest partsthe lightest shades, so that the various shades "are procured by thevarious thicknesses of the carbon, hence the etching fluid percolatesthrough the carbon and etches the copper exactly in the gradations ofthe shade of the design photographically.

Specification oi Letters ratent.

to protect by Letters Patented Mar. 14, 1916.

Application flied November 21, 1914. Serial No. 873,416.

The copper cylinder or plate containing the engraving is placed on aprinting machine provided with arrangements for supplying ink to theengraved surfaces, and also provided with a doctor knife which removesthe superfluous ink and regulates the amount of ink retained in theengraving.

The paper Which is gum or dextrin coated is sheet or reel fe'd. Thedesign may be similarly developed from a carbon print direct 'upon aplate and printed on a fiat bed photogravure printing machine. Thecylinders or plates employed may be copper or steel or other metaleither solid or deposited. The colors used will be pigment or mineralcolors, such as now used in the decoration of pottery or glass, whichwill stand the firing process required for pottery or enamel ware.

By this-invention I am enabled to produce ceramic transfers by directintaglio printing, that is direct froman engraved or etched copper steelor other metal cylinder or plate so that the pigment lies in relief onthe surface of the transfer. The enlargement, reduction and reproductionof designs being entirely photographic will be much cheaper and moreaccurate than the old method and the range of pictorial photographicdesigns will be much greater.

The invention is also applicable for producing transfers for glass wareand vitreous or other enamel ware such as enameled iron plates foradvertising or other purposes.

What I claim as my invention and desire atent is 2- 1. The process forpreparing transfers for printing upon pottery and enamel ware whichconsists in preparing a photographic negative of the design direct fromthe drawing, picture or subject, obtaining a positive therefrom on glassor transparent film, photographing or printing onto a carbon tissuesensitized paper from the positive, affixing the latter onto a burnishedmeta] surface developing same onto the metal surface, etching the sameinto the metal surface in intaglio to receive the printing ink andfinally printing the design therefrom in relief upon adhesive coatedpaper in an ink of mineral color suitable for ornamenting pottery orother ware substantially as described.

2. The process for preparing transfers for printing upon pottery andenamel ware,

which consists in preparing a photographic or gum coated paperin an inkof mineral. color sultable for ornamenting pottery and other waresubstantially as described.

In testimony whereof I have hereunto set 15 my hand in presence of twosubscribing witnesses.

SHELDON LEICESTER.

Witnesses:

JAMES S. INGRAM, J. P. HOWARD.

